/contrib/groff/src/libs/libgroff/maxpathname.cpp

 1// -*- C++ -*-
 2/* Copyright (C) 2005 Free Software Foundation, Inc.
 3     Written by Werner Lemberg (wl@gnu.org)
 4
 5This file is part of groff.
 6
 7groff is free software; you can redistribute it and/or modify it under
 8the terms of the GNU General Public License as published by the Free
 9Software Foundation; either version 2, or (at your option) any later
10version.
11
12groff is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License along
18with groff; see the file COPYING.  If not, write to the Free Software
19Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21/* path_name_max(dir) does the same as pathconf(dir, _PC_PATH_MAX) */
22
23#include "lib.h"
24
25#include <sys/types.h>
26
27#ifdef HAVE_UNISTD_H
28#include <unistd.h>
29#endif /* HAVE_UNISTD_H */
30
31#ifdef _POSIX_VERSION
32
33size_t path_name_max()
34{
35  return pathconf("/", _PC_PATH_MAX) < 1 ? 1024 : pathconf("/",_PC_PATH_MAX);
36}
37
38#else /* not _POSIX_VERSION */
39
40#include <stdlib.h>
41
42#ifdef HAVE_DIRENT_H
43# include <dirent.h>
44#else /* not HAVE_DIRENT_H */
45# ifdef HAVE_SYS_DIR_H
46#  include <sys/dir.h>
47# endif /* HAVE_SYS_DIR_H */
48#endif /* not HAVE_DIRENT_H */
49
50#ifndef PATH_MAX
51# ifdef MAXPATHLEN
52#  define PATH_MAX MAXPATHLEN
53# else /* !MAXPATHLEN */
54#  ifdef MAX_PATH
55#   define PATH_MAX MAX_PATH
56#  else /* !MAX_PATH */
57#   ifdef _MAX_PATH
58#    define PATH_MAX _MAX_PATH
59#   else /* !_MAX_PATH */
60#    define PATH_MAX 255
61#   endif /* !_MAX_PATH */
62#  endif /* !MAX_PATH */
63# endif /* !MAXPATHLEN */
64#endif /* !PATH_MAX */
65
66size_t path_name_max()
67{
68  return PATH_MAX;
69}
70
71#endif /* not _POSIX_VERSION */